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*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
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Used
2021 GMC Sierra 1500 SLT trucks
for sale
near
Green Park, MO
- Down Payment
- $0
- Net trade-in value
- $0
- Months
- 72
- APR
- 7.0%
- Sales tax
- 0.0%
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
MATT WAS GREAT TO DEAL WITH.
MATT WAS GREAT TO DEAL WITH. HE TOOK EXTRA TIME TO MAKE SURE I UNDERSTOOD ALL FEATHURES. LOVE THE TRUCK AND THE POWER. I WILL TELL MY FRIENDS AND FAMILY.
This truck has a jerk when changing gears sometimes.
This truck has a jerk when changing gears sometimes. I enjoy the truck overall easy to handle and comfortable. Drive with ease sight is good when driving.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I got a Jeep at Frank Leta today and it was a great
I got a Jeep at Frank Leta today and it was a great experience. Will Ziebers was very helpful and nice. This was my 2nd car from Frank Leta and great service each time.
Brake Pad Monitor
2021 GMC sierra 1500, 5.3, crew cab 4x4, 21000 miles. brakepad monitor lites up. dealership says needs brakes and rotors in back. one mo. on warranty. our rural roads dirty up the monitor. Needs new monitor. brakes look great to me. No noises. dealer says parts on order GM strike. Can't replace myself cause of computer...
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Service was quick.
Service was quick. I drove the car right in. They got it right in. Did the oil change and all the other good stuff that needed to be done I was done in a little over an hour.
Nicest, best performing truck I've ever owned
My truck has a great appearance, inside and out. It is a pleasure to drive; and rides and performs great. It is the best truck I've ever owned.
Vehicle information
Features
Reviews
Thank you Aaron Voege
My salesman Aaron Voege was excellent,courteous and I will recommend him to all my friends.. He made the transition from my Altima to my new Rogue perfect. Thank you Aaron..
2021 GMC Sierra Denali
This is the nicest truck I have ever owned. Lots of features. Takes a while to learn what all it does but a really enjoyable vehicle.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Wonderful experience!
Wonderful experience! Laura Buick didn?t disappoint as usual! Repeat buyer and will do it again! The staff and facilities are first class! Our salesman Cory Sperry was phenomenal!
Great Buy!
This truck is amazing. Turning heads all over as we tour the area. Those riding with is also enjoy the comforts and safety features. Great Buy!
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Bruno was great to work with, very professional.
Bruno was great to work with, very professional. They met my expectations. Have used them several times and will continue in the future.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I highly recommend this business.
I highly recommend this business. I was completely impressed with Angelo, and the service department. Very knowledgable, reliable and honest. Angelo took the time to answer all of my questions, and provided me with available options from repair to replacement.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Justin was easy to work worth, made buying the 2026 truck
Justin was easy to work worth, made buying the 2026 truck quite painless. Very knowledgeable. He was very prompt in returning my phone calls. Would buy from him again.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Work was done on Schedule, actually completed prior to
Work was done on Schedule, actually completed prior to estimated completion time. Both my Service Advisor Jerry and the Tech, came to me afterwards to make sure everything was Satisfactory. Thank You
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GMC Certified
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GMC Sierra 1500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 1500 SLT |
About the 2021 GMC Sierra 1500 SLT
SLT shown.
- Seating
- 5
- Door count
- 4
- Drivetrain
- Rear Wheel Drive
- Combined MPG
- 17
- Transmission
- 10-Speed A/T
- Engine
- 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
How much does the 2021 GMC Sierra 1500 SLT cost?
The 2021 GMC Sierra 1500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 1500 SLT is $35,966, with pricing starting at $21,999.
What is the MPG of the 2021 GMC Sierra 1500 SLT?
The 2021 GMC Sierra 1500 SLT offers up to 15 MPG in city driving and 22 MPG on the highway for a combined rating of 17 MPG.
These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle options, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2021 GMC Sierra 1500 SLT?
The 2021 GMC Sierra 1500 SLT compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 1500 SLT reliable?
The 2021 GMC Sierra 1500 has an average reliability rating of 3.5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 1500 owners.
60% of drivers recommend this car
- Comfort 4.2
- Interior 4.2
- Performance 3.8
- Value 3.6
- Exterior 4.3
- Reliability 3.5
SLT (3 styles)
| Style | ||
|---|---|---|
| 4WD Crew Cab 147" SLT | 2WD Crew Cab 147" SLT | 4WD Crew Cab 157" SLT |
| Inventory price | ||
| Starting at $50,800 | Starting at $47,500 | Starting at $51,100 |
| Combined MPG | ||
| 18 | 17 | 18 |
| Engine | ||
| 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) |
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
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This vehicle is certified pre-owned, backed by a manufacturer warranty, and typically undergoes a rigorous multi-point inspection to ensure quality and reliability.
This vehicle is currently in high demand given its competitive price, desirable features, and overall condition, and may have a higher chance of selling quickly.
